Ystad is plagued by several spectacular robberies of security vans, with cars set on fire and motorways being blocked. At one occasion, the police cadets Isabelle and Pontus happen to be at the scene of crime. They try to hunt down the robbers, but it ends up with Pontus being captured.
Kurt Wallander finds a clue that leads him to Sven Adelgren, an older friend and former colleague. Sven now works for the security company Skandiguard, which owns the security vans that have been robbed. Meanwhile, detective Svartman works a case with a murdered orienteer. As he follows in the footsteps of the dead man he stumbles upon the robber gang and is close to getting himself killed.